CN204229601U - High sensitivity water sensor circuit - Google Patents
High sensitivity water sensor circuit Download PDFInfo
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- CN204229601U CN204229601U CN201420626922.9U CN201420626922U CN204229601U CN 204229601 U CN204229601 U CN 204229601U CN 201420626922 U CN201420626922 U CN 201420626922U CN 204229601 U CN204229601 U CN 204229601U
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Abstract
High sensitivity water sensor circuit, it comprises water logging end of probe positive pole, water logging end of probe negative pole, Transient Suppression Diode D1, the first resistance, triode and the second resistance; Wherein, water logging end of probe positive pole is connected with Transient Suppression Diode D1 negative pole, and water logging end of probe negative pole is connected with Transient Suppression Diode D1 positive pole; Water logging end of probe positive pole is connected with the first resistance; Water logging end of probe negative pole is connected with ground; First resistance one end connects positive metal water logging end of probe, other end connecting triode base stage; Triode is positive-negative-positive structure, is operated on off state, and transistor base connects the first resistance and accesses for water sensor, and emitter connects the second resistance, grounded collector; Second resistance, one end connects 5V power supply, the emitter of other end connecting triode.The utility model realizes water logging warning function, with low cost, can commercially use in enormous quantities, and daily servicing is simple, and the life be convenient for people to, reduces unnecessary loss.
Description
Technical field
The utility model belongs to electronic information field, particularly high sensitivity water sensor circuit.
Background technology
In daily life; often the tap water escape in family can be run into; or the heating installation in the north has been metalled run out, or sewer has blocked up the situation of anti-addle in own home, brings no small economic loss can to oneself or neighbours downstairs; make troubles to family life; water immersion alarm price is in the market higher, and circuit is complicated, and practicality is bad; not easy care, sensitivity is low.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of high sensitivity water sensor circuit.
The utility model is achieved through the following technical solutions, and high sensitivity water sensor circuit comprises water logging end of probe positive pole, water logging end of probe negative pole, Transient Suppression Diode D1, the first resistance, triode and the second resistance; Described water logging end of probe positive pole is connected with Transient Suppression Diode D1 negative pole, and water logging end of probe negative pole is connected with Transient Suppression Diode D1 positive pole; Described water logging end of probe positive pole is connected with the first resistance; Described water logging end of probe negative pole is connected with ground; First resistance one end connects positive metal water logging end of probe, other end connecting triode base stage; Described triode is positive-negative-positive structure, is operated on off state, and transistor base connects the first resistance and accesses for water sensor, and emitter connects the second resistance, grounded collector; The second described resistance, one end connects 5V power supply, the emitter of other end connecting triode.
Water logging end of probe of the present utility model adopts metal material, when having water to exist between two metal water logging end of probe, owing to there is voltage between two metal water logging end of probe, water is ionized, make the conducting of two metal water logging end of probe, electric current passes through the base stage of the first resistance and triode, and then make the extreme and collector terminal conducting of triode emission, the extreme voltage of triode emission becomes high level from low level, this change has been water-soaked two metal water logging end of probe, this circuit set function of sensor and amplifier, can the information of highly sensitive perception water logging, and the signal of the high-impedance state of water logging can be converted to the Transistor-Transistor Logic level that single-chip microcomputer can process.
Water logging end of probe, has two, and one is positive one negative, and wherein positive metal water logging end of probe connects the first resistance, negative metal water logging end of probe ground connection, and water logging end of probe, for contacting the water surface, plays sensor effect; First resistance, one end connects positive metal water logging end of probe, and other end connecting triode base stage, for water sensor adjustment of sensitivity; Triode, this triode is positive-negative-positive structure, is operated on off state, transistor base connects the first resistance and accesses for water sensor, emitter connects the second resistance, grounded collector, and whether the corresponding metal water logging of the on off operating mode between emitter with collector end of probe is soaked in water; Second resistance, one end connects 5V power supply, and the emitter of other end connecting triode is for limiting the electric current of emitter after triode ON; Transient Suppression Diode, one end is connected with the first resistance and positive metal water logging end of probe, other end ground connection, for the electrostatic suppressing metal water logging end of probe to enter into circuit.
The utility model compared with prior art, adopt common electronic devices and components, form simple circuit realiration water logging warning function, whole circuit by two resistance, a Transient Suppression Diode, a triode composition, with low cost, can commercially use in enormous quantities, daily servicing is simple, the life be convenient for people to, reduces unnecessary loss.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Be described in further detail below in conjunction with accompanying drawing 1 pair of the utility model, but embodiment of the present utility model is not limited thereto.
As shown in Figure 1, high sensitivity water sensor circuit comprises water logging end of probe positive pole, water logging end of probe negative pole, Transient Suppression Diode D1, the first resistance, triode and the second resistance; Described water logging end of probe positive pole is connected with Transient Suppression Diode D1 negative pole, and water logging end of probe negative pole is connected with Transient Suppression Diode D1 positive pole; Described water logging end of probe positive pole is connected with the first resistance; Described water logging end of probe negative pole is connected with ground; First resistance one end connects positive metal water logging end of probe, other end connecting triode base stage; Described triode is positive-negative-positive structure, is operated on off state, and transistor base connects the first resistance and accesses for water sensor, and emitter connects the second resistance, grounded collector; The second described resistance, one end connects 5V power supply, the emitter of other end connecting triode.
This water sensor circuit exports to single-chip microcomputer treatment circuit, processes water logging signal.
Water logging end of probe of the present utility model adopts metal material, when having water to exist between two metal water logging end of probe, owing to there is voltage between two metal water logging end of probe, water is ionized, make the conducting of two metal water logging end of probe, electric current is by the base stage of the first resistance R1 and triode Q1, and then make triode Q1 emitter terminal and collector terminal conducting, electric current after conducting has R2 to control, the extreme voltage of triode emission becomes high level from low level, this change has been water-soaked two metal water logging end of probe, this circuit set function of sensor and amplifier, can the information of highly sensitive perception water logging, and the signal of the high-impedance state of water logging can be converted to the Transistor-Transistor Logic level that single-chip microcomputer can process.
The utility model compared with prior art, adopt common electronic devices and components, form simple circuit realiration water logging warning function, whole circuit by two resistance, a Transient Suppression Diode, a triode composition, with low cost, can commercially use in enormous quantities, daily servicing is simple, the life be convenient for people to, reduces unnecessary loss.
Claims (1)
1. high sensitivity water sensor circuit, is characterized in that: comprise water logging end of probe positive pole, water logging end of probe negative pole, Transient Suppression Diode D1, the first resistance, triode and the second resistance; Described water logging end of probe positive pole is connected with Transient Suppression Diode D1 negative pole, and water logging end of probe negative pole is connected with Transient Suppression Diode D1 positive pole; Described water logging end of probe positive pole is connected with the first resistance; Described water logging end of probe negative pole is connected with ground; First resistance one end connects positive metal water logging end of probe, other end connecting triode base stage; Described triode is positive-negative-positive structure, is operated on off state, and transistor base connects the first resistance and accesses for water sensor, and emitter connects the second resistance, grounded collector; The second described resistance, one end connects 5V power supply, the emitter of other end connecting triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420626922.9U CN204229601U (en) | 2014-10-28 | 2014-10-28 | High sensitivity water sensor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420626922.9U CN204229601U (en) | 2014-10-28 | 2014-10-28 | High sensitivity water sensor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204229601U true CN204229601U (en) | 2015-03-25 |
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ID=52927668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420626922.9U Active CN204229601U (en) | 2014-10-28 | 2014-10-28 | High sensitivity water sensor circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204229601U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558169A (en) * | 2015-09-29 | 2017-04-05 | 哈尔滨东方报警设备开发有限公司 | A kind of water immersion alarm based on STC85C92 |
| CN111649801A (en) * | 2020-08-10 | 2020-09-11 | 江西科技学院 | Infrared monitoring alarm device and alarm method thereof |
-
2014
- 2014-10-28 CN CN201420626922.9U patent/CN204229601U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558169A (en) * | 2015-09-29 | 2017-04-05 | 哈尔滨东方报警设备开发有限公司 | A kind of water immersion alarm based on STC85C92 |
| CN111649801A (en) * | 2020-08-10 | 2020-09-11 | 江西科技学院 | Infrared monitoring alarm device and alarm method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |